FlockOTweets is a very simple service that groups your followers into easily digestible RSS chunks. Basically, you enter the Twitter usernames (separated by comma), and click on Get RSS Feed or Daily Digest.

Twe2 is a free Twitter SMS alerts service for people living outside the US. The service is straight forward; you create an account, add your mobile number, and start receiving your Twitter Direct Messages and @Replies by SMS. (more…)

Song.ly Share & Discover Music on Twitter!
Submit a link to an mp3 file you’ve found on the Web. Your followers will get a short link to a page allowing them to play the song right in the browser without having to download it first.